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arXiv 1102.1793quant-phphysics.atom-ph
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Cs $_2$分子在光晶格中的最佳俘获波长

Optimal trapping wavelengths of Cs$_2$ molecules in an optical lattice

Romain Véxiau, Nadia Bouloufa, Mireille Aymar, Johann Georg Danzl, Manfred J Mark, Hans-Christoph Naegerl, Olivier Dulieu

摘要:

本论文的目的是寻找在光晶格中囚禁Cs $_2$分子的最佳参数,以期产生基态分子的量子简并气体.利用精确的电势曲线和电子跃迁偶极矩,计算了Cs $_2$分子在振荡电场作用下的动态极化率。我们证明了对于某些特定的光晶格波长,称为“魔波长”,基态分子的极化率等于Feshbach分子的极化率。由于基态分子样品的产生依赖于来自在费什巴赫共振上产生的弱结合分子的绝热布居转移,这种巧合确保初始和最终状态都被晶格光有利地捕获,从而允许与实验观察一致的优化转移。

英文摘要:

The present paper aims at finding optimal parameters for trapping of Cs$_2$ molecules in optical lattices, with the perspective of creating a quantum degenerate gas of ground-state molecules. We have calculated dynamic polarizabilities of Cs$_2$ molecules subject to an oscillating electric field, using accurate potential curves and electronic transition dipole moments. We show that for some particular wavelengths of the optical lattice, called "magic wavelengths", the polarizability of the ground-state molecules is equal to the one of a Feshbach molecule. As the creation of the sample of ground-state molecules relies on an adiabatic population transfer from weakly-bound molecules created on a Feshbach resonance, such a coincidence ensures that both the initial and final states are favorably trapped by the lattice light, allowing optimized transfer in agreement with the experimental observation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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